Cow-milker.



No. 693,850. l Patented Feb. 25, |902.

i A. A. & H. A. EWALD.

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@witnesses l www www No. 693,856 Patented Feb. 25, |902.

A. A. a H. A. lawALn..-

cow mun-:3.

(Applieazionmed June 5, 190x.)

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UNITED STATES PATENT OFFICE.

ARNO A. EVVALD AND HERMANNA. EWALD, OF ELGIN, WISCONSIN.

COW-MILKER.

SPECIFICATION forming part of LettersPatent No. 693,850, dated February 25, 1902.

Application filed .Tune 5, 1901. Serial No. 63,261. (No model.)

T0 @ZZ whom it may concern:

Be it known that we, ARNO A. EWALD and HERMANN A. EWALD, citizens of the United i States, residing at Elginin the county of4 of the invention, such-as will enable others.

skilled in the art to which it appertains to make and use the same.

This invention relates to milking-machines; y

and it has for its object to provideaconstruction wherein by rotation of a crank the several teat-s will be operated simultaneously to squeeze the milk therefrom, a further object of the invention being to provide a construcv tion wherein the separate milking devices may be adjusted in conformity with the separation of the teats.

Additional objects of the invention are to provide a simple means forholding the milking devices in position and a convenient arrangement of receptacle for the milk.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a side elevation showing Fig. 2 is an elevation showing the supporting-arm with one of vthe milkers thereon, the milker being illus- Fig. 3 is a dej trated in its spread position. tailed perspective view of one of the milkers,

' a portion of the casing being broken away to more clearly show the interior mechanism. Fig. 4. is a top plan view of the support with the milkers removed therefrom.

Referring now to the drawings, the present milker is employed in connection with a stool, including a top 10, having supporting-legs 11, and at one side of which is fixed a mast 12. The mast includes a tubular lower section and an upper section 13,fittedslidably therein, se that it may be raised to different elevations. From the upper section 13 extend' two arms 14 and 15, the lower of which is slidable longitudinally of a mast, and with the ends of these arms are pivotally connected the links at one end of lazy-tongs 1G, the end portions of the arms 14 and 15 including separate sections pivotally connected for lateral swinging movement and beingheld in different positions by set-screws, as shown. At the outer end of the lazy-tongs is the main supportingcasting, including an annular frame 17, havinet` av bracket 18, provided with'ears 19 and 20, to which the adjacent end links of the lazy-tongs arepivoted, the car 2O being mounted for sliding movement toward and away from the ear 19to conform to the movement of the lazy-tongs. Thus the casting 17 may be moved away from or toward the stool, as may be desired, and may be swung laterally as the occasion may direct. The casting 17 has a number of upwardly-directed.fingers 2l, spaced at regular intervals, and to each of these lingers is pivoted one of the milking` devices, and as these separare milking devices have all the same constructiona description of one will suffice for them all. Each milking device then includes a casing comprising a bodyv portion 22, in the form of a boxing, and having a downwardly-extending stem 23, which is directly pivoted to a finger 2l, so that the casing may be pivot-ally moved toward and away from the axis of the Vcasting i 17. rlhe body 22 has three sides closed, and

the inner face, or the face toward the axis of 'the casting 17, is open, and parallel with this open face is disposed a transverselyarcuate plate 24, having supporting-legs 25, which extend downwardly and are curved to lie'at opposite sides ofthe bifurcations ofthe finger l21, and between which bifurcations the stem 23 is pivoted. The plate 2-l maythus be moved toward and away from the open inner side of the casing, and the shape of this plate is such that it may conform tothe shape of a teat, *y

and on its inner face is provided with a soft covering 26, of rubber or other suitablematerial, to prevent injury to the tea't.

Passed transversely through the body of the 'casing,at the upper and lower ends thereof,are shafts 27' and 28, and on the shaft 27 are fixed two sprocket-wheels 29, while on the shaft 28 are fixed two additional sprocket-wheels 30, two of the wheels of each set, or rather each wheel of one set, lyingin the same plane with the corresponding wheel of the other set, so that they may receive sprocket-chains 31 and 32. Two of thelinks of each chain are pro vided with bearings, and in each pair of corresponding bearings is journaled a shaft 33, on which is disposed a drum 34., having a yieldable lface 35, there being two of thesedru ins so disposed that when the sprocket-Wheels are rotated the drums are moved successively to apointadjacent to the upper end of the arcuate plate IOO and then carried bodily in a plane parallel therewith, each roller in this parallel movement being adapted to engage the teat and press it with a rolling contact against the arcuate pressure-plate. By this means the milk is squeezed from the teat and is received in a tube 3G. The tube 36 is passed upwardly between the legs 25, and the upper portion thereof` forms the facing 26 of the arcuate plate, this upper portion being flared and taken over the tops of the sprocket-chains and attached to the side and rear walls of the casing. The teat to be milked is received directly within the upper end of this tube and is held from contact with the sprocket chains and wheels and also from direct contact by the presser-rolls.

To rotate the sprockets to actuate their chains, the shaft 28 has a bevel-gear 37, with which is engaged a corresponding gear 88, carried by a shaft 39, mounted in suitable bearings upon the facing and having a globular gear-wheel 4() at its lower end, which meshes with a corresponding gear 4l, mounted upon a spindle on the casting 17, the construction of the globular gear being such as to permit.

of rotation thereof from the gear 4l in whatever part of its pivotal movement the casing of the milker may be; To rotate the gear 41, a bevel-gear 42 is engaged therewith and is carried by a tu mbling-rod 43, connected with an operating crank-shaft 44, having a crank 45. Thus as the crank is operated the presserrolls ofthe several milkers are caused to move downwardly of the arcuate plate. If the teats of the cow are far apart, it is of course necessary to spread the group of milkers at the upper ends thereof, and for this purpose a shiftrod46 is slidably mounted in the casting 17, andat the upper end thereof is a spider 47, the rod being reciprocated to correspondingly move the spider by means of a h and-lever 48, pivoted to the casting 17 and to the shift-rod, said lever having a trigger 49 and pawl for cooperation with a rack 50 to hold the lever in different positions. An angular lever 51 is pivoted to the side of the body 22 of each casing and is in the form of three sides of a parallelogram, the pivot being at the upper corner. The free end of the upper side of this lever 51 is connected with an arm of the spider 47 by means of a connecting-rod 52, while the free end of the lower side is connected pivotally with the corresponding arcuate plate 24. Thus if the spider be raised the several levers 51 will first be actuated to separate the casings and their corresponding pressure-plates, after which the milking devices will be moved pivotally outwardly, so as to spread the upper end of `the group.

The several tubes 36 are connected with a trunk-tube 55, having a metallic coupling member 56 at its free end, in which is disposed a glass 57 to show the flow of milk therethrough, and this coupling member is adapted for engagement with a second member 58 upon a second section 59 of the trunktube, through which the milk is discharged to a suitable receptacle.

What is claimed is- 1. A milking device comprising a base having a gear mounted thereon for movement in a horizontal plane, a plurality of milking devices pivoted to the base and each including presser-rolls and a presser-plate adjustable toward and away from the rolls, connections between the rolls and the gear for operating the rolls, a reciprocatory shaft mounted in the base and having a spider having connections with the milking devices and their plates for adjusting the plates and moving the milking devices pivotally when the shaft is reciprocated, and means for reciprocating the shaft.

2. A device of the class described comprising a group of milking devices pivoted for movement of their upper ends toward and away from each other, each milking device including a presser-plate and a presser-roll movable longitudinally thereof, an actuatinggear, a shaft for each milking device operatively connected therewith and having a gear engaged with the actuating-gear, means for rotatingthe actuating-gear andasingle means connected with the milking devices and their presser-plates for adjusting them.

3. A device of the class described comprising a frame having a gear mounted thereon, a plurality of milking devices pivoted to the frame about the gear for movement of their upper ends toward and away from each other, each milking device including an operatingshaft having a globular pinion engaged with the gear, and means for rotating the gear.

4. A device of the class described comprising an annular series of milking devices pivotally mounted for movement of their upper ends toward and away from each other and a single master-gear `disposed within the inclosure of the milking devices and in the plane of the centers of pivotal movement thereof and with which all of the milking devices are operatively connected.

5. A device of the class described comprising an annular series of milking devices each including a presser-plate and presser-rolls for cooperation therewith, the said plate being adjustable toward and away from the rolls and the whole number of milking devices being pivotally mounted for movement of their upper ends toward and away from each other, means for actuating the milking devices and a single means connected with the milking devices for simultaneously moving them pivotally and adjusting their presserplates toward and away from the rolls.

In testimony whereof we hereunto sign'our names, in the presence of two subscribing witnesses, on the'14th day of March, 1901.

ARNO A. EWALD. HERMANN A. EWALD. lVitnesses:

HUGH BURLETON, ROBERT D'UTHIE.

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